CN1168612A - Method and apparatus for signal transmission in CDMA mobile communication system - Google Patents
Method and apparatus for signal transmission in CDMA mobile communication system Download PDFInfo
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- CN1168612A CN1168612A CN97113262A CN97113262A CN1168612A CN 1168612 A CN1168612 A CN 1168612A CN 97113262 A CN97113262 A CN 97113262A CN 97113262 A CN97113262 A CN 97113262A CN 1168612 A CN1168612 A CN 1168612A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
- H04B7/2628—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA]
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- H—ELECTRICITY
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- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
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Abstract
A method and an apparatus for signal transmission in a CDMA mobile communication system which are capable of preventing an unnecessary increase of an amount of interference power due to the signal transmission through a radio channel and thereby preventing an unnecessary decrease of a system capacity. In the radio channel, where the radio channel transmission signals contain the transmission signals which are formed by control signals or user signals and necessary signals which are necessary in maintaining the radio channel, and this radio channel transmission is controlled so that only signal portions for the necessary portions are transmitted without transmitting any other signal portions when there is no transmission signal to be transmitted.
Description
The present invention relates to the method and apparatus of the signal transmission in CDMA (Code Division Multiple Access-code division multiple access) mobile communication system, base station and travelling carriage communicate by the emission transmission signals according to the CDMA mode in this system, and this transmission signals is formed by control signal or subscriber signal by the radio channel of setting up between each base station and travelling carriage.
Herein, to be a kind of normal signal transmission method that is used for mobile communication system of example explanation with a radio channel, this radio channel is to set up the current mobile communication service that is mainly used in Europe of GSM before base station in the digital mobile communication system of a kind of GSM of being called and the initiation of communication between the travelling carriage.
In GSM, a plurality of transmission signals between travelling carriage and the base station by being transmitted in the radio channel of between this travelling carriage and this base station, setting up before the initiation of communication.Reach hundreds of millisecond (msec) in each base station and the needed transmission signals of travelling carriage processing time, and during this processing time on this radio channel no transmission signals be transmitted.But in conventional mobile communication system (GSM), this radio channel is transmitted and all the time continuously no matter whether the transmission signals that is transferred is arranged.
Now, in CDMA mobile communication system, power system capacity is determined by interference power quantity, and this power system capacity reduces along with the increase of interference power quantity.For preventing the increase of interference power quantity, need to eliminate the radio channel transmission that is wasted.
But, even in this routine CDMA mobile communication system, when the transmission signals preparation is transmitted by the radio channel between base station and travelling carriage, always this radio channel is transmitted continuously no matter have or not transmission signals to be transmitted, so interference power quantity is unnecessarily increased, and power system capacity is unnecessarily reduced.
Therefore, the purpose of this invention is to provide the method and apparatus that is used in the signal transmission of CDMA mobile communication system, this system can prevent owing to the signal transmission by radio channel causes the increase that interference power is unnecessary, thereby prevent unnecessary the reducing of power system capacity.
According to an aspect of the present invention, base station in CDMA mobile communication system or travelling carriage provide a kind of method for transmitting signals, in this system, base station and travelling carriage will communicate by the emission transmission signals according to the CDMA mode, this transmission signals is formed by control signal or subscriber signal through the radio channel of setting up between travelling carriage and base station, this method comprises these steps, they are, by this radio channel transmitting radio Channel Transmission signal, this radio channel transmission signals comprise this transmission signals and in safeguarding radio channel needed necessary signals, and control only be useful on when this step of transmitting does not have transmission signals to be launched with box lunch must part signal section be launched and do not launch any other signal section.
According to a further aspect in the invention, base station in CDMA mobile communication system and travelling carriage provide the device that is used for the signal transmission, in this system, base station and travelling carriage communicate by the emission transmission signals according to the CDMA mode, this transmission signals is formed by the control signal and the subscriber signal of the radio channel that process is set up between travelling carriage and base station, this device comprises: be used for the transmission unit through radio channel transmitting radio Channel Transmission signal, the radio channel transmission signals comprise transmission signals and in keeping radio channel necessary necessary signals, and only launch signal section that must be partly when being used for not having transmission signals to be launched with box lunch and do not launch the control unit of any other signal section by the transmission of transmission unit control radio channel.
Other characteristic of the present invention and advantage will be from below in conjunction with apparent the description of the drawings.
Fig. 1 is the block diagram that the Typical Disposition of the signal transmitting apparatus that is used to realize method for transmitting signals according to the present invention is shown.
Fig. 2 demonstrates the type signal form of radio channel transmission signals of the 1st embodiment that is used for method for transmitting signals according to the present invention and the schematic diagram of corresponding transmission mode.
Fig. 3 illustrates the typical signal format of radio channel transmission signals of the 2nd embodiment that is used for method for transmitting signals according to the present invention and the schematic diagram of corresponding transmission mode.
Fig. 4 illustrates to be used for according to the present invention at the typical signal format of the radio channel transmission signals of the 3rd embodiment of method for transmitting signals and the schematic diagram of corresponding transmission mode.
Fig. 5 illustrates to be used for according to the present invention at the typical signal format of the radio channel transmission signals of the 4th embodiment of method for transmitting signals and the schematic diagram of corresponding transmission mode.
Fig. 6 be for a typical example according to the present invention with the schematic diagram that is used in the typical change of the type signal form of the radio channel transmission signals of the 5th embodiment of method for transmitting signals and the quality of reception that the respective transmissions pattern illustrates this essential signal.
Fig. 7 is for another typical example, and the schematic diagram of typical change of the quality of reception of essential signal is shown with type signal form that is used for the radio channel transmission signals in the 5th embodiment of method for transmitting signals and respective transmissions pattern according to the present invention.
Fig. 8 illustrates to be used for according to the present invention at the type signal form of the radio channel transmission signals of the 6th embodiment of method for transmitting signals and the schematic diagram of respective transmissions pattern.
Describe the various embodiment that are used for according to the present invention at the method and apparatus of the signal transmission of CDMA mobile communication system in detail referring now to Fig. 1-Fig. 8.In the following description, keeping the necessary signal of radio channel for being reduced to essential signal for purpose of brevity.
At first, Fig. 1 illustrates and is used to the travelling carriage that is implemented in the method for transmitting signals in the CDMA mobile communication system or the Typical Disposition of signal of base station transmitting device according to the present invention.In realizing method for transmitting signals of the present invention, each base station and travelling carriage can use the signal transmitting apparatus in identical configuration as shown in Figure 1.
Signal transmitting apparatus among Fig. 1 comprises: the essential signal generating unit 10 that is used to produce essential signal; Be used to produce the transmission signals generating unit 11 of the transmission signals that is launched through radio channel, this transmission signals is that control signal that is provided by control unit 23 or the subscriber signal that is provided by subscriber signal generating unit 27 form; Be used for being somebody's turn to do essential signal and transmission signals from essential signal generating unit 10 and 11 receptions of transmission signals generating unit respectively, and form unit 12 according to the signal format that has/do not have the signal format that forms the radio channel transmission signals of transmission signals; Be used for encoding and produce the coding unit 13 of code signal by the signal format that the signal format by radio channel is formed; Be used for producing the modulating unit 14 of spread signal by the signal that modulation and expansion are encoded; By carrying out such as the control of the transmission ON/OFF of D/A conversion and frequency translation and regulation and being used to realize processing, be used for producing the transmission unit 15 of radio channel transmission signals from this spread signal by the amplification of the through-put power of through-put power determining unit 25 defineds; Be used for distributing selectively radio channel transmission signals and received signal duplexer 16; And the antenna 26 that is connected with duplexer 16.
The signal transmitting apparatus of Fig. 1 further comprises: be used for the signal that is received is carried out receiving element 17 such as the processing of amplification, frequency translation and A/D conversion; The received signal that is provided by receiving element 17 by anti-expansion and demodulation is used to produce the demodulating unit 18 of restituted signal; Be used for the transmission signals that is included in restituted signal is decoded and decoded transmission signals supplied with the decoding unit 19 of control unit 23; Be used for extracting the essential signal extraction unit 20 of essential signal from restituted signal; Be used to measure the receive frequency measuring unit 21 of the receive frequency of the essential signal that is extracted; Be used to measure the quality of reception measuring unit 22 of the quality of reception of the essential signal that is extracted; When carry out being used to when signal transmitting apparatus controlled producing the control unit 23 of transmission signals comprehensively from the control signal that wherein produces; For control transmission power, be used for the quality of reception of measured essential signal and the quality of regulation are compared so that judge the measured quality of reception whether be higher than the comparing unit 24 of the quality of defined; According to the through-put power determining unit 25 that transmission power control information in the essential signal that is extracted is used for definite through-put power that is included in by communication station regulation; And the subscriber signal generation unit 27 that is used to produce subscriber signal.
Subscriber signal generation unit 27 comprises transmitter or is used under the situation of travelling carriage interface to outside terminal at the signal transmitting apparatus that uses Fig. 1, or is used in use under the situation of signal transmitting apparatus of Fig. 1 of base station to the interface from the wire transmission circuit at upper level station.
Next, be described in detail in first embodiment with reference to Fig. 2 according to the method for transmitting signals in the CDMA mobile communication system of the present invention.
Fig. 2 is illustrated in typical signal format and the corresponding transmission mode that is used for the radio channel transmission signals among this first embodiment.
In this case, essential signal generation unit 10 produces essential signal consistently at the peak frequency place, and the essential signal that is produced is offered signal format formation unit 12.Then, when from transmission signals generation unit 11 supply transmission signals, by will from must the signal generation unit 10 the essential signals of supplying with at peak frequency combine signal format formation unit 12 formation signal formats with the transmission signals of supplying with from transmission signals generation unit 11 (cycle 30).
On the other hand, when not having transmission signals to be transmitted through radio channel, like this, just there is not transmission signals to be supplied to from transmission signals generation unit 11 yet, signal format forms unit 12 and forms signal format by only using at the peak frequency place by the essential signal of essential signal generation unit 10 supplies, is used to place transmission signals blank (cycle 31) and stay several portions.
Then, form unit 12 formed signal formats by signal format and be encoded, modulate and expand, and the spread signal that is obtained is supplied with transmission unit 15 at coding unit 13 and modulating unit 14.When the control of the transmission ON/OFF stipulated, at transmission unit 15, will carry out such as D/A conversion, frequency translation with respect to the spread signal of being supplied with, and processing such as amplification.In this transmission ON/OFF control, in signal format, exist the part transmission of signal to be set to out, that is, and essential signal section and transmission signals part, and in blank parts, this transmission is set to close.Fig. 2 illustrates transmission mode, and this pattern indication is regularly consistent with signal format in the transmission ON/OFF of transmission unit 15.
As shown in Figure 2, in this 1st embodiment, when not having transmission signals, in those parts of placing transmission signals, transmission is set to close, and makes unwanted radio channel transmission be cancelled like this.Thereby might prevent the unnecessary increase of the quantity of interference power, also therefore prevent unnecessary the reducing of power system capacity.In addition, must be launched regularly by signal, even like this so that during those cycles that do not have transmission signals to be launched, also might keep good transmission quality by keeping radio channel.
Next, will be described in detail in the 2nd embodiment with reference to Fig. 3 according to the method for transmitting signals in the CDMA mobile communication system of the present invention.
Fig. 3 is illustrated in typical signal format and the corresponding transmission mode that is used for the radio channel transmission signals among this 2nd embodiment.
In this case, essential signal generation unit 10 produces essential signal consistently at the peak frequency place, and the essential signal that is generated is supplied with signal format formation unit 12.Then, when transmission signals is supplied with by transmission signals generation unit 11, signal format forms unit 12 and forms signal format by will be at the peak frequency place being combined with transmission signals by transmission signals generation unit 11 (cycle 40) supply by the essential signal of essential signal generation unit 10 supplies.
On the other hand, when not having transmission signals to be transmitted through radio channel, therefore there is not transmission signals when transmission signals generation unit 11 is supplied to, signal format form unit 12 by make come at the peak frequency place quantity of the defined of the essential signal that free essential signal generation unit 10 supplies with only use after tailing off and tailing off remaining must signal formation signal format, and stay that several portions is used to place transmission signals and the blank (cycle 41) of the essential signal section that tails off.
Fig. 3 describes 4 typical case that essential signal tails off from per 5 essential signals, and this transmission mode is shown, and this pattern is indicated in the transmission unit 15 transmission ON/OFF timing consistent with signal format.
As shown in Figure 3, in this 2nd embodiment, when not having transmission signals, in order to reduce their transmission frequency, these must be tailed off by signal, like this so that more further eliminate unnecessary radio channel transmission, thereby also might prevent the increase that interference power quantity is unnecessary, and therefore prevent unnecessary the reducing of power system capacity with the 1st embodiment of Fig. 2.Here it should be noted that it is nonsensical keeping good wireless radio channel transmission quality during not having those cycles of transmission signals.Because this cause, in the 2nd embodiment, by reduce must signal transmission frequency further reduce the quantity of interference power, and allow do not having to reduce transmission quality during those cycles of transmission signals.In addition, continue the essential signal of emission so that radio channel might be kept and can not produce the disengaging synchronous regime reception one side.
Next, will be described in detail in the 3rd embodiment with reference to Fig. 4 according to the method for transmitting signals in the CDMA mobile communication system of the present invention.
Fig. 4 is illustrated in type signal form and the corresponding transmission mode that is used for the radio channel transmission signals among this 3rd embodiment.
In this case, essential signal generation unit 10 produces essential signal consistently at the peak frequency place, and the essential signal that is produced is supplied with signal format formation unit 12.Then, when transmission signals when transmission signals generation unit 11 is supplied to, signal format forms unit 12 and forms signal format by will be at the peak frequency place being combined with transmission signals by transmission signals generation unit 11 (cycle 50) supply by the essential signal of essential signal generation unit 10 supplies.
Afterwards, when not having transmission signals to be launched through radio channel thereby when transmission signals generation unit 11 is not supplied with transmission signals, signal format form that the specified quantity of unit 12 by the essential signal that makes comfortable peak frequency place and supplied with by essential signal generation unit 10 tails off and only use tail off and later remainingly must form signal format by signal.Here, the essential signal of the quantity of the regulation that is tailed off transmits firm the beginning at last once transmission signals when finishing increases gradually along with the disappearance of time.With such method, to transmit at last once transmission signals and just to begin once finishing immediately regularly, transmission frequency that must signal section reduces gradually.Here the essential signal section that is used to place the transmission signals part and tails off is left blank (cycle 51).
The order that Fig. 4 has described by 0 → 1 → 2 → 3 progressively increases some essential signals that will be tailed off so that sequentially reduce the typical example of the transmission frequency of essential signal, and is illustrated in the transmission unit 15 transmission ON/OFF quantitative transmission mode consistent with signal format.
As shown in Figure 4, in this 3rd embodiment, when the transmission signals before and then transmits just when not having transmission signals to be launched after finishing, transmit the firm time that after finishing, regularly begins immediately along last transmission signals, transmission frequency that must signal descends gradually.In this mode, when after last once transmission signals transmission is finished, next transmission signals occurring immediately, the transmission frequency of essential signal does not also descend a lot, therefore, before the transmission quality of this radio channel descends significantly, next transmission signals might be launched, thereby high transmission success rate might be kept next transmission signals.On the other hand when next transmission signals not occurring in a period of time after the transmission of last once transmission signals is finished, by reduce must signal transmission frequency might reduce the quantity of interference power.
In the mobile communication system that a plurality of transmission signals are transmitted, exist the situation that requirement conducts interviews to the user memory in the network, and the situation that does not require such user memory visit.Under the situation that requires this user memory visit, long by this user memory visit institute's time spent, make that like this time interval between a transmission signals transmission and the transmission of next transmission signals is elongated.Under the situation that does not require the user memory visit, can launch more than one transmission signals more continually.Therefore, exist two kinds of opposite extreme situations of the transmission signals Transmission Time Interval of short transmission signals Transmission Time Interval and length for more than one transmission signals.
In this 3rd embodiment, under the situation of short transmission signals Transmission Time Interval because essential signal transmission is little to the influence of the quantity of interference power, therefore, will be given higher priority for the high-transmission success rate of next transmission signals in such a case.On the other hand, under the situation of long transmission signals Transmission Time Interval, because essential signal transmission is big to the value effect of interference power, therefore, in this case, by reduce must signal the transmission frequency numerical value that reduces interference power will be given higher priority.
Secondly, with reference to Fig. 5, be described in detail in the 4th embodiment according to the method for transmitting signals in the CDMA mobile communication system of the present invention.
Fig. 5 illustrates typical signal format and the corresponding transmission mode that is used at the radio channel transmission signals of the 4th embodiment.
In this case, must produce essential signal consistently at the peak frequency place by signal generation unit 10, and the essential signal that is produced is supplied with signal format formation unit 12.Then, when transmission signals was supplied with by transmission signals generation unit 11, signal format formed unit 12 and forms signal format by will be at the peak frequency place being combined with transmission signals by transmission signals generation unit 11 (cycle 60) supply by the essential signal of essential signal generation unit 10 supplies.
On the other hand, when not having transmission signals to be launched through radio channel thereby when transmission signals generation unit 11 is not supplied with transmission signals, this signal format form unit 12 by will specifying number of the essential signal of peak frequency place from the essential signal of supplying with by essential signal generation unit 10 tail off and only use tail off and later remainingly must form signal format by signal, be used to the essential signal blank parts (cycle 61) of placing transmission signals and tailing off and stay several portions.
Afterwards, when the transmission signals that is launched occurred once more, signal format formed unit 12 and forms signal format by only using at the peak frequency place by the essential signal of essential signal generation unit 10 (cycle 62) supply in the official hour cycle.Then, signal format forms unit 12 and forms later signal format by will be at the peak frequency place being combined with transmission signals by transmission signals generation unit 11 (cycle 63) supply by the essential signal of essential signal generation unit 10 supplies.
Fig. 5 is illustrated in transmission unit 15 indications transmission ON/OFF regularly the transmission mode consistent with signal format.
As shown in Figure 5, in this 5th embodiment, official hour before the transmission signals transmission is transmitted in the essential signal at peak frequency place in the cycle, therefore, after the transmission quality of radio channel is modified fully, might carry out the transmission signals transmission, thereby might improve the transmission success rate of transmission signals transmission.
Secondly, with reference to Fig. 6 and Fig. 7, with the 5th embodiment that is described in detail in according to the method for transmitting signals in the CDMA mobile communication system of the present invention.
In this 5th embodiment, quality of reception measuring unit 22 is measured the quality of reception of the essential signal that is received, and notifies control unit 23 with measurement result.Here, the measurement result that is notified to control unit 23 can be the measured quality of reception of an essential signal, or for the mean value of the measured received signal of the essential signal of the number that is prescribed, or for the mean value with the measured quality of reception of interior all received essential signals in the official hour cycle.
Then, when the quality of reception by quality of reception measuring unit 22 notice becomes when being lower than the quality of reception that is prescribed, or the state that becomes the quality of reception that be lower than appointment when the quality of reception of being notified in official hour is when occurring continuously, perhaps when the quality of reception of being notified in the cycle at official hour became the state continuation of the quality of reception that is lower than regulation, control unit 23 formed unit 12 is provided with essential signal with the highest rank transmission frequency with the command signal form.In response, signal format forms unit 12 and forms signal format by using the essential signal at the peak frequency place, and no matter have or not the transmission signals that is launched and the transmission frequency of the essential signal under the definition status of that order of reception.
In addition, when the quality of reception of being notified by quality of reception measuring unit 22 becomes when being higher than the quality of reception of regulation, perhaps working as the become state of the quality of reception that is higher than regulation of the quality of reception of being notified continuously occurs in object time at stated number, perhaps work as the quality of reception of being notified and become the state of the quality of reception that is higher than defined when official hour continued in the cycle, control unit 23 command signal forms form the transmission frequency that unit 12 is provided with the essential signal that is lower than highest level.In response, when the transmission signals that under receiving the definition status of that order, is not launched, the essential signal that signal format forms defined quantity in the essential signal of being supplied with by essential signal generation unit 10 by comfortable peak frequency place in the future unit 12 tail off and only use tail off and later remainingly must form signal format by signal.
Because in this 5th embodiment, measured by quality of reception measuring unit 22 qualities of reception, therefore might use to receive SIR (signal/interference ratio), it is desirable signal incoming level and the ratio that disturbs incoming level, perhaps for example is the error rate.
Illustrate with the typical change that is used in the quality of reception of the essential signal of the type signal form of the radio channel transmission signals of this 5th embodiment and corresponding transmission mode for use receiving SIR typical case Fig. 6 as the quality of reception.
In this typical case, transmission frequency that must signal becomes under the definition status that is lower than setting P and is controlled in highest level receiving SIR, and become under the definition status that is higher than setting P receiving SIR, the transmission frequency that this must signal is controlled as and is lower than highest level.Therefore, the transmission frequency of (cycle 70 and 72) essential signal becomes and is lower than highest frequency during receiving those cycles that SIR is higher than setting P, and be lower than at reception SIR during those cycles (cycle 71) of setting P must signal transmission frequency become highest frequency.
Note, in Fig. 6, use identical setting P to be used for determining regularly so as to improve the transmission frequency of essential signal (at the edge between cycle 71 and 72) and be used for determining regularly so as reduction must signal (edges between cycle 71 and 72) transmission frequency.But also might use different settings to be used for determining these two timings.
Be also noted that, the directed use of Fig. 6 is with respect to the typical case of a setting of two transmission frequencies, but also might use more than one setting with respect to the transmission frequency more than two, so that realize control in more minutes, in this case, transmission frequency that must signal will be enhanced De Genggao and be used for the lower tested quality of reception.
For the typical case of using with respect to 3 settings of 4 transmission frequencies, with the typical signal format and the corresponding transmission mode that are used at the radio channel transmission signals of this 5th embodiment, Fig. 7 illustrates the typical change of the quality of reception of essential signal.
At Fig. 7 in typical case, 3 setting P
1, P
2And P
3Be set to receive SIR by descending (order of the quality of reception from high to low), so that define 4 types cycle, these cycles comprise: receive SIR and be higher than P
1In the cycle in (cycle 80), receive SIR and be higher than P
2But be lower than P
1In the cycle in (cycle 81), receive SIR and be higher than P
3And be lower than P
2The cycle in (cycle 82), and reception SIR is lower than P
3The cycle in (cycle 83).Then, according to this cycle of 4 types, some essential signals that tail off from the essential signal of highest frequency are set to 3,2,1 and 0 respectively, so that change the transmission frequency of essential signal.
In being used for the radio channel of mobile communication, uplink channel (from the travelling carriage to the base station) has high relevant transmission quality with downgoing line channel (from the base station to the travelling carriage), therefore when when a station quality of reception is hanged down, at the quality of reception at other station step-down too.
Therefore, in this 5th embodiment, suppose, when in the quality of reception of the essential signal of our station when low, the quality of reception at corresponding station is step-down too, and transmission frequency that must signal is enhanced so that improve from the transmission quality of the radio channel of our station emission, thereby improves the quality of reception at corresponding station.On the contrary, suppose when the quality of reception of the essential signal of our station when being high, the quality of reception at corresponding station be height too, and transmission frequency that must signal is lowered so that prevent the increase that the numerical value of interference power is unnecessary, thereby prevents unnecessary the reducing of power system capacity.
Next, will be described in detail in the 6th embodiment with reference to Fig. 8 according to the method for transmitting signals in the CDMA mobile communication system of the present invention.
In this 6th embodiment, essential signal extraction unit 20 extracts received essential signal, and when owing to the reason of the low quality of reception when official hour does not detect essential signal in the cycle, essential signal extraction unit 20 is just with this true control unit 23 of notifying.Then, when this notice was received, control unit 23 formed unit 12 is provided with essential signal at maximum level transmission frequency with regard to the command signal form.In response, signal format forms unit 12 and forms signal format by using the essential signal at the highest frequency place, and no matter have or not the transmission signals that is launched and the transmission frequency of the essential signal when the timing of that order of reception.
In addition, when owing to fail in the cycle to detect that essential signal has improved the quality of reception later on and once more when official hour detects essential signal in the cycle, essential signal extraction unit 20 is with this true control unit 23 of notifying at official hour.Then, when this notice was received, control unit 23 command signal forms formed the transmission frequency that unit 12 is provided with the essential signal that is lower than maximum level.In response, when in the timing that receives that order, there is not transmission signals to be launched, then this signal format forms that unit 12 forms signal format by essential signal is tailed off so that realization is lower than the transmission frequency by the specified maximum level of control unit 23.
Fig. 8 illustrates typical signal format and the corresponding transmission mode that is used at the radio channel transmission signals of this 6th embodiment.
In this case, after the received timing that must signal have a detected judgement during the cycle of the timing (cycle 91) of the received judgement that must signal be detected, transmission frequency that must signal is controlled in maximum level.In (cycle 90) during the received cycle before must the timing of the undetected judgement of signal with failing to detect during cycle after the timing of the received received judgement that must signal be detected after must signal, transmission frequency that must signal also is controlled as and is lower than maximum level.
As mentioning, relevant with the 5th embodiment discussed above, be used for the radio channel of mobile communication, uplink channel and downgoing line channel have high associated transport quality, therefore, when the quality of reception is low to not detecting at a station must signal the time, be low too in other station quality of reception.
For this cause, in this 6th embodiment, suppose when essential signal when our station can not be detected, the quality of reception at the correspondence station also may be low, and, transmitting pin that must signal is enhanced so that improve transmission quality by the radio channel of our station emission, thereby improves the quality of reception at corresponding station.On the contrary, suppose, when when the essential signal energy of our station is detected, the quality of reception at the correspondence station uprises equally, and transmission frequency that must signal is lowered, so that prevent the unnecessary increase of interference power numerical value, thereby prevent unnecessary the reducing of power system capacity.
Next be described in detail in the 7th embodiment according to the method for transmitting signals in the CDMA mobile communication system of the present invention.
In this 7th embodiment, must extract received essential signal by signal extraction unit 20, and receive frequency measuring unit 21 is measured the receive frequency of received essential signal, and notify control unit 23 in suitable timing measurement result.Then, control unit 23 given transmission frequencies form the transmission frequency of unit 12 as the essential signal when our station is launched to signal format, and this transmission frequency is consistent with measured receive frequency.Then, when not having transmission signals to be launched, signal format forms that unit 12 forms signal format by essential signal is tailed off so that the specified transmission frequency of realization control unit 23.
In the discussed above the 5th and the 6th embodiment, transmission frequency that must signal is changed according to the quality of reception or detection/non-detection that must signal.But such transmission frequency control only has the effect of the control quality of reception at the correspondence station, and does not have effect for improving the quality of reception at our station.About this point, in this 7th embodiment, when in the quality of reception of our station when low, the transmission frequency of the essential signal that is launched from our station will be enhanced, then, the transmission frequency of the essential signal of being launched by the correspondence station is improved according to the receive frequency by the essential signal of our station emission that is enhanced in corresponding station, therefore, the receive frequency of the essential signal of our station also and then improves, thereby the quality of reception of our station can be enhanced.
Therefore,, just can not only improve the quality of reception at corresponding station, and improve the quality of reception of our station by this 7th embodiment is combined with the above-mentioned the 5th or the 6th embodiment.
In addition, such situation is also arranged, the quality of reception that receives a side can not be only by improve in a direction must signal transmission frequency improve, but as the situation of the through-put power control that will illustrate below using, by improve in both sides' direction must signal transmission frequency can improve reception one side's the quality of reception.Even under these circumstances, this 7th embodiment also is effectively, because transmission frequency that must signal on both sides' direction can automatically be enhanced.
Next, with the 8th embodiment that is described in detail in according to the method for transmitting signals in the CDMA mobile communication system of the present invention.
In this 8th embodiment, must comprise that being implemented in reception one side has the pilot signal that is used in the coherent detection of interpolation method by signal generation unit 10.Can apply for finding among the international publication No.Wo95/35615 at PCT about pilot signal and details with coherent detection of interpolation method.
In a word, coherent detection with interpolation method is a kind of method, wherein well-known pilot signal is inserted radio channel with the frequency of regulation, make like this by receiving well-known pilot signal and carrying out coherent detection on the basis of the relevant estimated propagation function that is placed on two transmission signals between the pilot signal, receive a propagation function that can reach evaluating wireless electricity regional (radio section).
, when not having transmission signals to be launched, needn't estimate propagation function herein, make that like this transmission in the pilot signal at high-transmission frequency place causes the increase that interference power numerical value is unnecessary.For this cause, when not having transmission signals to be launched, interference power numerical value will reduce by the transmission frequency that reduces pilot signal in this 8th embodiment.
Next, with the 9th embodiment that is described in detail in according to the method for transmitting signals in the CDMA mobile communication system of the present invention.
In this 9th embodiment, must comprise synchronizing information by signal generation unit 10, this information is essential the recipient at the synchronization aspects of keeping the signal reception.In order to receive radio channel the recipient, essential foundation is synchronous with radio channel.Herein, synchronization timing will change along with moving of travelling carriage, therefore, must follow the synchronization timing that is changing for receiving a side, and in order to follow synchronization timing, must comprise the synchronizing information with well-known bit pattern for radio channel.
When the high-transmission frequency is used for synchronizing information, be used for can stably maintaining synchronously of signal reception and receive a side, and when the low transmission frequency was used for synchronizing information, the quality of reception of radio channel may descend, because it becomes and is in the disengaging synchronous regime easily for receiving a side.But,, be not easy to act as most when having transmission signals to be transmitted and reduce the transmission frequency that the quality of reception reduces essential signal by allowing in view of the frequent transmission of synchronizing information will increase interference power numerical value.About this point, this 9th embodiment is effectively, because when not having transmission signals to be launched in the 9th embodiment, the transmission frequency of synchronizing information is lowered.
Next, with the 10th embodiment that is described in detail in according to the method for transmitting signals in the CDMA mobile communication system of the present invention.
In this 10th embodiment, must signal generation unit 10 being included in time that signal transmission or signal receive neededly in carrying out ordered control has a serial number (ordernumber).
Requiring a typical example of ordered control is in conjunction with the example in the soft handing-over of distinctive feature of CDMA mobile communication system.In the soft handing-over time, travelling carriage and a plurality of base station communicate.For example, in a uplink direction, the radio channel of launching from single mobile station is received in a plurality of base stations, and the received signal of these a plurality of base stations is bonded to the upper level station of these base stations so that produce high-quality received signal.This in conjunction with in, do not guarantee to arrive the upper level station simultaneously from the signal of a plurality of receptions of a plurality of base stations, therefore, need to carry out ordered control so that in the middle of a plurality of received signals, determine corresponding combined received signal.For reaching this purpose, this travelling carriage emission has the radio frame of serial number, and a plurality of received signals centre that this upper level station will be incorporated in from a plurality of base stations has identical a plurality of frames that serial number is arranged.In this way, just might carry out highly reliable combination handles.
Now, have the ability only when transmission signals is launched, just to carry out ordered control, and when not having transmission signals to be launched, just do not need ordered control.For this cause, in this 10th embodiment, when not having transmission signals to be launched, the transmission frequency that serial number is arranged that is used for ordered control is lowered, and therefore might prevent the increase that interference power numerical value is unnecessary.
Next, with the 11st embodiment that is described in detail in according to the method for transmitting signals in the CDMA mobile communication system of the present invention.
In this 11st embodiment, must be included in needed transmission power control information in the control of execution through-put power by signal generation unit 10.Can be about the details of transmission power control method at U.S. Patent application No.5, find in 056,709.
According to this transmission power control method, the quality of reception of the essential signal that comparing unit 24 will be measured by quality of reception measuring unit 22 and the quality of regulation compare, and notify the quality that must the signal generation unit 10 measured qualities of reception whether be lower than regulation still to be higher than the quality of regulation.In response process, the transmission power control information that must signal generation unit 10 be included in must signal is set to one, promptly, when the measured quality of reception is lower than the quality of regulation, point out that by this position of setting through-put power rises, perhaps this points out the decline of through-put power by setting when the measured quality of reception is higher than the quality of regulation.
Then, the through-put power determining unit 25 at corresponding station receives essential signal from essential signal extraction unit 20, and when being included in transmission power control information in must signal is when pointing out a certain position that through-put power rises by setting, determine that by setting the defeated power of this value is a value that is higher than currency, be when pointing out a certain position that through-put power reduces, to determine that by setting through-put power is a certain value that is lower than currency perhaps by setting when being included in transmission power control information in must signal.Then, through-put power determining unit 25 is the transmission power value notification transmission unit 15 that is determined, and in response process, and transmission unit 15 so that obtain the transmission power value notified, produces the radio channel transmission signals by carrying out suitable amplification.
By aforesaid operations, just might make the quality of reception follow the quality of defined by control transmission power, thereby might work as the quality that satisfies defined the time, suppress interference power numerical value by reducing unnecessary through-put power.Compare by quality the measured quality of reception and regulation, and carry out the transmission of transmission power control information with higher frequency, the mistake of the quality of reception with respect to the quality of regulation may become littler, reduces or the unnecessary increase of interference power numerical value so that prevent quality.
Now, when not having transmission signals to be launched, even quality is reduced or the increase of interference power numerical value also has little influence with respect to the big mistake (error) of the quality of reception of the quality of regulation.For this cause, in this 11st embodiment, when not having transmission signals to be launched, the transmission frequency of transmission power control information is lowered, so that might prevent the increase that interference power numerical value is unnecessary.
It should be noted, above-mentioned method for transmitting signals according to the present invention is effective to the transmission signals of emission off and on, promptly, handling when control signal is when carry out travelling carriage or base station, emissioning controling signal not, so that making control signal is a kind of signal that is launched off and on, thereby the present invention can be effectively applied to the transmission of control signal.In addition, the subscriber signal that is launched by transmitted in packets also is the signal that is launched off and on, and therefore, the present invention can be applicable to the transmission of subscriber signal effectively.For example, the present invention can be applicable to and use picture transmission of the user profile of employed IP grouping in the rapid Internet network of promoting in recent years., have only when forming some operation in terminal by the user, this IP grouping just is launched herein, and therefore, it is the signal that is launched off and on.Except this use IP transmission packets, the transmission of using the user profile of other packet oriented protocol such as X.25 also can be transmission intermittently, so that make the present invention can be applicable to common transmitted in packets effectively.
Should also be noted that except top narrated, under the condition that does not break away from novelty of the present invention and favourable feature, above embodiment can produce many modifications and variations.Therefore, all such modifications and variation are prescribed within the scope that is included in additional claims.
Claims (24)
- Therein base station and travelling carriage according to the CDMA scheme by emission by through the base station in the control signal of the radio channel that between travelling carriage and base station, produces or the CDMA mobile communication system that the formed transmission signals of subscriber signal communicates or the method for transmitting signals of travelling carriage, may further comprise the steps:By radio channel transmitting radio Channel Transmission signal, this radio channel transmission signals comprises transmission signals and necessary essential signal in keeping radio channel; AndHave only when the control transmission step does not have transmission signals to be launched with box lunch must part signal section be launched and do not launch any other signal section.
- 2. the method for claim 1, when wherein controlled step is controlled transmission signals that this step of transmitting is launched with box lunch and is existed, by with transmission signals and must signal combination getting up, maybe when having transmission signals to be launched by only using essential signal formation radio channel transmission signals.
- 3. the process of claim 1 wherein, when this controlled step is controlled this step of transmitting and is not had transmission signals to be launched with box lunch in stability at lower frequencies, and when the transmission signals that is launched exists at the signal section of the higher essential signal of transmission frequency place emission.
- 4. the method for claim 1, wherein, this controlled step is controlled this step of transmitting so that launch the signal section of essential signal at the transmission frequency place, regularly being gradually reduced immediately after this transmission frequency is finished since the transmission of the transmission signals of last time is not launched yet have transmission signals after the transmission of last once transmission signals is finished.
- 5. the method for claim 1, wherein, this controlled step is controlled this step of transmitting, at the signal section of the essential signal of transmission frequency place emission that is lower than high-transmission frequency, and after being in the signal section that has only essential signal and being launched, the high-transmission frequency in official hour cycle do not launch the signal section of transmission signals next time when having transmission signals to be launched with box lunch.
- 6. the method for claim 1 further comprises following step: the quality of reception of measuring the received signal section of the essential signal of launching from the correspondence station; Launch the signal section of essential signal when wherein, controlled step control step of transmitting is hanged down by the measured quality of reception of measuring process with box lunch at higher transmission frequency place.
- 7. the method for claim 6, wherein, measuring process is measured the reception SIR of received signal section that must signal as the quality of reception.
- 8. the method for claim 6, wherein, measuring process is measured the error rate of received signal section that must signal as the quality of reception.
- 9. the method for claim 1, signal section that must signal when wherein, controlled step control step of transmitting is not detected in the time cycle of defined from the signal section that is received of the essential signal of correspondence station emission with box lunch in high-transmission frequency emission.
- 10. the method for claim 1 further comprises following step: the receive frequency of measuring the received signal section of the essential signal of being launched by the correspondence station; Wherein, controlled step control step of transmitting in case with signal section by the identical essential signal of transmission frequency place emission of the measured receive frequency of measuring process.
- 11. the method for claim 1, wherein, controlled step control step of transmitting is so that must signal and must tail off by signal by placing off and on and periodically, and the signal section of not launching the essential signal that has tailed off forms the radio channel transmission signals, so that the transmission frequency of signal section that must signal is changed by changing some essential signals that tailed off.
- 12. the method for claim 1, wherein, step of transmitting forms the radio channel transmission signals by using essential signal, these must comprise any one or a plurality ofly have necessary pilot signal in the coherent detection of interpolation method in execution, keeping necessary synchronizing information in synchronous that signal receives receiving a side, carrying out in the time that signal transmission or signal receive necessaryly in the ordered control has serial number, and in carrying out through-put power control necessary transmission power control information.
- 13. therein base station and travelling carriage according to the CDMA scheme by emission by through the base station in the CDMA mobile communication system of the control signal of the radio channel that between travelling carriage and base station, produces or the transmission signals executive communication that subscriber signal forms or the signal transmitting apparatus of travelling carriage: comprising:Be used for the transmitter unit of transmitting radio Channel Transmission signal by radio channel, this radio channel transmission signals is included in keeps necessary transmission signals and essential signal in the radio channel; AndThe radio channel transmission that is used for the control transmission unit only is useful on essential signal section partly and is launched and does not launch any other control unit of signal section when not having transmission signals to be launched with box lunch.
- 14. the device of claim 13, wherein, when this control unit is controlled transmission signals that this transmitter unit is launched with box lunch and is existed by with transmission signals with must combine by signal, maybe when having transmission signals to be launched by only using essential signal formation radio channel transmission signals.
- 15. the device of claim 13, when wherein, control unit control transmitter unit does not have transmission signals to be launched with box lunch than low transmission frequency place and when the transmission signals that is launched exists the emission of higher transmission frequency place be used for must signal signal section.
- 16. the device of claim 13, wherein, control unit control transmitter unit is so that be used for the signal section of essential signal in the emission of a certain transmission frequency place, this transmission frequency is finished later regularly reducing gradually immediately since the transmission of the transmission signals of last time, is not launched yet have transmission signals after last transmission signals transmission is once finished.
- 17. the device of claim 13, wherein, the signal section that is used for essential signal when control unit control transmitter unit does not have transmission signals to be launched with box lunch in the transmission frequency place emission that is lower than high-transmission frequency, and at official hour in the cycle, at high-transmission frequency place, only be useful on must signal signal section launch the signal section of transmission signals next time after being launched.
- 18. the device of claim 13 further comprises:Be used to measure from the measuring unit of the quality of reception of the received signal section of the essential signal of correspondence station emission; The signal section that is used for essential signal when wherein, control unit control transmitter unit is reduced by the measured quality of reception of measuring unit with box lunch in the emission of higher transmission frequency place.
- 19. the device of claim 18, wherein, the measuring unit measurement is used for the reception SIR of received signal section of essential signal as the quality of reception.
- 20. the device of claim 18, wherein, the measuring unit measurement is used for the error rate of received signal section of essential signal as the quality of reception.
- 21. the device of claim 13, wherein, control unit control transmitter unit with box lunch from the received signal section of the essential signal of correspondence station emission when official hour was not detected in the cycle high-transmission frequency emission be used for must signal signal section.
- 22. the device of claim 13 further comprises:Be used to measure from the measuring unit of the receive frequency of the received signal section of the essential signal of correspondence station emission; Wherein, control unit control transmitter unit in case with the signal section that is used for essential signal by the identical transmission frequency place emission of the measured receive frequency of measuring unit.
- 23. the device of claim 13, wherein, control unit control transmitter unit is so that by placing essential signal off and on and periodically, will must signal tail off and do not launch the signal section formation radio channel transmission signals of the essential signal that tails off, and changes by changing some essential signals that tail off for use in the transmission frequency of signal section that must signal.
- 24. the device of claim 13, wherein, transmitter unit forms the radio channel transmission signals by using essential signal, these must signal packet be contained in necessary any one or a plurality of pilot signal in the coherent detection with interpolation method, keeping the synchronous necessary synchronizing information that is used in the signal reception that receives a side, in the time of signal transmission or signal reception, necessary in carrying out ordered control have a serial number, and in carrying out through-put power control necessary transmission power control information.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP154469/96 | 1996-06-14 | ||
| JP15446996 | 1996-06-14 |
Publications (2)
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| CN1168612A true CN1168612A (en) | 1997-12-24 |
| CN1088310C CN1088310C (en) | 2002-07-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97113262A Expired - Lifetime CN1088310C (en) | 1996-06-14 | 1997-06-13 | Method and apparatus for signal transmission in CDMA mobile communication system |
Country Status (6)
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| US (1) | US6026279A (en) |
| EP (1) | EP0813317B1 (en) |
| KR (1) | KR100310615B1 (en) |
| CN (1) | CN1088310C (en) |
| CA (1) | CA2207645C (en) |
| DE (1) | DE69736854T2 (en) |
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| JP3798549B2 (en) * | 1998-03-18 | 2006-07-19 | 富士通株式会社 | Multi-beam antenna system for radio base station |
| JP2000261375A (en) * | 1999-03-06 | 2000-09-22 | Matsushita Electric Ind Co Ltd | Radio receiver and receiving power amplifying method |
| WO2000062435A1 (en) | 1999-04-12 | 2000-10-19 | Samsung Electronics Co. Ltd | Method for controlling gated transmission of dedicated channel in w-cdma communication system |
| US6603753B1 (en) * | 1999-12-03 | 2003-08-05 | Lucent Technologies Inc. | Down-link transmission inter-cell scheduling in CDMA data networks |
| AU758025B2 (en) * | 2000-04-26 | 2003-03-13 | Qualcomm Incorporated | Method of supporting power control on DCCH in BS |
| JPWO2003049322A1 (en) * | 2001-11-30 | 2005-04-21 | 富士通株式会社 | Transmission diversity communication device |
| US7370066B1 (en) * | 2003-03-24 | 2008-05-06 | Microsoft Corporation | System and method for offline editing of data files |
| US20080123792A1 (en) * | 2006-11-27 | 2008-05-29 | Edoardo Prete | Apparatus and method for transmitting signals over a signal line |
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| US5016255A (en) * | 1989-08-07 | 1991-05-14 | Omnipoint Data Company, Incorporated | Asymmetric spread spectrum correlator |
| US5056109A (en) * | 1989-11-07 | 1991-10-08 | Qualcomm, Inc. | Method and apparatus for controlling transmission power in a cdma cellular mobile telephone system |
| MX9301888A (en) * | 1992-04-10 | 1993-11-30 | Ericsson Telefon Ab L M | MULTIPLE ACCESS OF TIME DIVISION FOR ACCESS OF A MOBILE IN A MULTIPLE ACCESS SYSTEM OF DIVISION OF CODE. |
| US5526383A (en) * | 1992-08-14 | 1996-06-11 | Fujitsu Limited | Network control system for controlling relative errors between network nodes |
| JP2911090B2 (en) * | 1993-09-29 | 1999-06-23 | エヌ・ティ・ティ移動通信網株式会社 | Mobile communication base station device and mobile station device |
| FI94579C (en) * | 1994-01-12 | 1995-09-25 | Nokia Mobile Phones Ltd | Data Transfer method |
| WO1995022213A1 (en) * | 1994-02-09 | 1995-08-17 | Ntt Mobile Communications Network Inc. | Method and system for cdma mobile radio communication |
| JP2974274B2 (en) * | 1994-05-12 | 1999-11-10 | エヌ・ティ・ティ移動通信網株式会社 | Transmission power control method and transmission power control device |
| JP3078216B2 (en) * | 1995-12-13 | 2000-08-21 | 株式会社エヌ・ティ・ティ・ドコモ | Base station selection method |
-
1997
- 1997-06-12 DE DE69736854T patent/DE69736854T2/en not_active Expired - Lifetime
- 1997-06-12 EP EP97109573A patent/EP0813317B1/en not_active Expired - Lifetime
- 1997-06-12 CA CA002207645A patent/CA2207645C/en not_active Expired - Lifetime
- 1997-06-12 US US08/873,738 patent/US6026279A/en not_active Expired - Lifetime
- 1997-06-13 CN CN97113262A patent/CN1088310C/en not_active Expired - Lifetime
- 1997-06-13 KR KR1019970024648A patent/KR100310615B1/en not_active IP Right Cessation
Also Published As
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|---|---|
| KR980007117A (en) | 1998-03-30 |
| US6026279A (en) | 2000-02-15 |
| DE69736854D1 (en) | 2006-12-07 |
| EP0813317A2 (en) | 1997-12-17 |
| CA2207645C (en) | 2001-02-20 |
| KR100310615B1 (en) | 2001-12-15 |
| CN1088310C (en) | 2002-07-24 |
| CA2207645A1 (en) | 1997-12-14 |
| EP0813317A3 (en) | 2001-10-31 |
| EP0813317B1 (en) | 2006-10-25 |
| DE69736854T2 (en) | 2007-05-24 |
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